WildMidi is a wave table player that uses Gus Pat sound
sets to play MIDI files. It is capable of multi-threading
and multi-processing of MIDI files, allowing for the mixing
of multiple MIDI files at any one time.

Airtime lets you take total control of your radio station via the Web with intelligent archive management, powerful search, an easy playlist builder, a simple scheduling calendar, and rock-solid automated playout. Features include fades, cues, playlists, a programme calendar, Icecast, Shoutcast, and Soundcloud integration, DJ and station manager roles, JQuery widgets, Liquidsoap playout, and a record and rebroadcast functionality. Powerful media archive features 'watch' folders to allow stations to magically synchronize files, auto-import files, and has multiple directory support. Users can interact with it through any Web browser. It comes with an 'easy install' package.

Nsound is a C++ library and Python module for audio synthesis that features dynamic digital filters. Nsound lets you easily shape waveforms and write to disk or plot them. Nsound aims to be as powerful as Csound but easy to use.

Summer is a library that lets a developer quickly and easily create applications that can automatically download multimedia files from Web feeds. In other words, it is for creating podcast clients and broadcaching applications.

Muxic is a minimal user interface to XMMS2. It is inspired by Winamp Classic's windowshade. It is only meant for controlling and monitoring playback, not for managing a media library or even a playlist. To actually play music, it relies on the XMMS2 (the X-platform Music Multiplexing System 2) daemon, and another XMMS2 client must be used to put some music in your playlist. Muxic's keybindings are based on a subset of Winamp Classic's keyboard shortcuts. Muxic announces track changes using Growl.

libNUI is a hardware accelerated GUI framework that makes it possible to build rich multi-platform applications based on 3D rendered dynamic layouts. Interfaces are built as a composition of widgets and behaviors, and the framework handles positioning, resizing, anchoring, and texture stretching. Objects are connected with synchronous events and delegates for mono-threaded communication, or asynchronous notifications and message queues are used for multi-threaded applications. It also supports strings (including Unicode), paths, files, data streams, fonts, threads, critical sections, audio buffer rendering, and more.

iTool Video Cutter for Mac is an applicaton that removes unwanted parts from and converts video and audio files. It can also be used to make ring tones for cell phones. It supports AVI, MPEG, MP4, WMV, 3GP, H.264/MPEG-4 AVC, H.264/PSP AVC, MOV, ASF, WAV, AAC, MP3, AC3, and WMA formats.

iTool WMA MP3 Converter for MAC is an application that converts batches of audio files between MP3, AAC, M4A, WAV, Ogg Vorbis, and WMA formats. It uses the LAME encoder, allows you select the quality of the output file, and supports MP3 VBR and AAC VBR.